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200301 (4!)^n is a factor of 12!, but (4!)^(n+1) is not a factor of 12!, what is the value of n?
191222
There is a dug on a surface, a frog at 4foot below the dug, and then another frog is 3.5foot from dug and 3.5 foot from the first frog. How far is this frog under the surface?
191222 There is a number E, which is a four-digit number, and each digit is an even number; One number is O, which is also a four-digit number, but every digit is odd. There is currently a number W=E+O, and W is a number with five digits, so how many of the five digits of W can't be odd?
191222 Here is a sequence of 9 numbers, and g(n) means the value of nth term. For example, for the nine numbers: 9 8 7 6 5 4 3 2 1, then g(7)=3, so what's the value of g(g(g(4)))?
191222 There are 10 pairs of socks of different colors and the two socks that are in pair are the same. Take out 12 socks from the ten pairs and what is the least number of socks in pairs of these 12 socks?
190215 Beef, chicken and bacon can be added between the two hamburgers. If the order of different kinds of meat is ignored, how many different hamburgers can be made?
190215 There is a cube with six faces labeled. Someone is going to paint this cube with three colors, one for each side. The colors of adjacent faces are different. How many coating methods are there?
191020 When m and n are divided by 7, the remainders are both 3, so what is the remainder when mn is divided by 7?
191031 What is the value of remainder when 2 ^ 5550 is divided by 7?
190215 5$$x^{2}$$ - 2x - 39=0(x > 0).x=?
190302 How many solutions does the equation |2x-3|=x-5 have?
190302 One shop sells two kinds of bowls. Each class a bowl costs $15. The price of each class B bowl is $18. Initially, there were 20 class A bowls and 18 class B bowls in this shop. A week later, the store's sales were $222. How many bowls are left in class A?
190302 还原机经选题: 数论&代数 n=1234567891011121314…. n is an integer composed of positive integers arranged in order. From left to right, what is the 72nd digit of n?
KMFPS If x and y are positive integers such that the remainder when x is divided by 5 is 2 and the remainder when y is divided by 5 is 3, what is the remainder when xy is divided by 5?
KMFPS If n is a multiple of 3, what is the remainder when 15n is divided by 6?
OG19-数学分册 The infinite sequence $${a}_{1}$$, $${a}_{2}$$,..., $${a}_{n}$$,... is such that $${a}_{1}={2}$$, $${a}_{2}=-{3}$$, $${a}_{3}={5}$$, $${a}_{4}=-{1}$$, and $${a}_{n}={a}_{n-4}$$ for $$n > 4$$. What is the sum of the first 97 terms of the sequence?
Ready4

How many integers that have a value less than satisfy the inequality ?
OG15 OG16 OG17 OG18 OG19 OG20 OG2022 Each year for 4 years, a farmer increased the number of trees in a certain orchard by $$\frac{1}{4}$$ of the number of trees in the orchard the preceding year. If all of the trees thrived and there were 6,250 trees in the orchard at the end of the 4-year period, how many trees were in the orchard at the beginning of the 4-year period?
Ready4

Don has  coins, which is 4 times as many as Bob and  as many as Candace. How many more coins do Bob and Candace have together than Don does, in terms of ?
Magoosh GMAT、gmat题库、gmat模考、gmat考满分In the diagram above, JKL is an equilateral triangle. Point M is the midpoint of segment JL, and M is the center of a circle that passes through points J and L. The shaded regions in the diagram indicate all the regions inside the circle that are outside the triangle. What fraction of the total area of the circle is outside the triangle?